wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Let p,q and r be the sides opposite to the angles P,Q and R respectively in a PQR. Then 2prsin(PQ+R2) equals

A
p2+q2+r2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
p2+r2q2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
q2+r2p2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
p2+q2r2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is D p2+r2q2
In PQR,P+Q+R=180

2prsin(PQ+R2)=2prsin180QQ2

=2prsin(90Q)

=2prcosQ

(In PQR,cosQ=p2r2q22pr)

=2pr(p2+r2q22pr)=p2+r2q2

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Vector Product
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon